Fountain Lamia

First, we need to eliminate the main cause of this problem. Of course you eliminated Lariane, but we cannot look at Lariane as the only suitable cause. I believe there is a high possibility of another suitable source within the Fountain Lamias. If so, we should hunt the Fountain Lamias first. I've told the guards this story too, so they will start hunting very soon. But we shouldn't delay while they are getting ready. I will entrust this task to you. While the guards are getting ready, go to the Grand Crimson area and slay 20 Fountain Lamias. Around the time you finish hunting, our guards will arrive. May the spirit's guidance shed light on your path.

Go to the Grand Crimson area and slay 20 Fountain Lamias. May the spirit's guidance shed light on your path.

You've done well. I've received a report that the guards have built upon your success, but we cannot rest yet.